DSP[0] Flashcards
DSP stands for?
Digital Signal Processing
is the process of analyzing and modifying a
signal to optimize or improve its efficiency or
performance.
Digital Signal Processing
is concerned with the representation of signals
by sequence of numbers or symbols and the
processing of these sequences.
Digital Signal Processing
is an electrical or electromagnetic
current that is used for carrying data from one
device or network to another.
signal
can be define as a function that
conveys information, generally about the state
or behavior of a physical system.
Signal
are represented as functions of one
or more independent variables.
Signal
are those
signals for which both time
an amplitude are continuous.
Analog Signal
are those
signals that are defined
only at a discrete units of
time.
Discrete signals
Involves analyzing, modifying and synthesizing signals to
pull meaning out of it.
Signal Processing
Two classification of signal processing:
- Analog Signal Processing
- Digital Signal Processing
deals with transformation of
analog signals
Analog signal processing
Processing is done using electrical networks consisting of
active and passive elements
Analog signal processing
deals with the
processing of discrete signals
Digital Signal Processing
Processing is done using general purpose
computers, ASICs, FPGAs, OSP chips etc.
Digital Signal Processing
used to filter out unwanted high frequency components from
raw analog input signal.
Pre-filter
converts analog signals to digital signals.
ADC
the digital signal is analyzed and processed and synthesized output
is fed to DAC
DSP
converts digital signals back to analog signals.
DAC
Used to filter out unwanted high frequency components in
the generated analog signal.
Post-Filter
Application of DPS
- Speech and audio processing
- Image and video processing
- Military and Telecommunication
- Healthcare and Biomedical sector
- Consumer electronics
This involves speech recognition and analysis
noise filtering, echo cancellation etc.
Speech and Audio Processing
This involves compression, enhancement,
reconstruction and restoration of images and
videos
Image and Video Processing
Its examples are radar tracking, modulation and
demodulation
Military and Telecommunication
Its example are analysis of ECG and X-ray signal
Healthcare and Biomedical Sector
Most digital equipment like smart phones,
televisions, digital camera etc. it has DSP
embedded on it to accelerate its
performance.
Consumer Electronics
Avantages of DPS
- Flexibility
- Error detection and correction features
- Data storage is easier
- Low cost
Disadvantages of DPS
- Higher power consumption
- Higher learning curve is required for
operation
